I've got a 30d M Sport with staggered 369M's, has anyone considered using wheel spacers? I think the track looks a bit narrow overall when compared with the body...if each wheel had an increase in offset of 20-25mm it would look much better (IMHO)

I'm not sure about spacers, I've never used them before, do they have an adverse effect on handling / steering? I've found these items, they look very well made and still allow the use of the OE wheel bolts: